Hey Yuvi,
As a checkuser, user agents are an important part of my workflow for identifying that multiple accounts are owned by the same person. So I'm going to have to argue for including more information in the user agent. Your proposed user agent would basically mean that every single person using the most up-to-date version of the app on a particular platform would be indistinguishable from each other. This would, unfortunately, lead to lots of innocent users getting blocked as sockpuppets.
Here's an example of a user agent from an iPhone using Safari: Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_1 like Mac OS X; zh-tw) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8G4 Safari/6533.18.5
Look at all of that wonderful information! ;-) In general, the more information you can include without breaching the user's privacy, the better.
I'd be happy to work with you on this.
Thanks,
Dan
P.S. You may also want to consult with the legal team, to ensure that an unacceptable levels of private information are not given out. They would also make a complement for me; I would likely be pulling in the direction of "MOAR INFORMATION!", whereas they would likely be pulling in the direction of "LESS INFORMATION!". :-)